Lighting system and method

Abstract

Lighting systems and methods are described, including track lighting systems and methods.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a lighting system according to an embodiment, which includes a track according to an embodiment, a power feed assembly according to an embodiment, a support assembly according to an embodiment, and a lamp assembly according to an embodiment.

FIG. 2 is a sectional view of the track of FIG. 1 taken along line 2-2.

FIG. 3 is enlarged perspective view of the power feed assembly of FIG. 1.

FIG. 4A is an exploded view of the power feed assembly of FIG. 1.

FIG. 4B is an enlarged view of a portion of the exploded view depicted in FIG. 4A.

FIG. 5 is a perspective view of a contact pad assembly of the power feed assembly of FIG. 1.

FIG. 6 is a sectional view of the power feed assembly of FIG. 1.

FIG. 7 is a partial sectional/partial elevational view of the power feed assembly of FIG. 1, except that wiring has been removed for clarity.

FIGS. 8A, 8B, 8C, 8D and 8E are elevational views depicting the coupling of the track of FIG. 1 to the power feed assembly of FIG. 1.

FIG. 9A is a partial sectional/partial top plan view of the track of FIG. 1 coupled to the power feed assembly of FIG. 1, but with selected components of the assemblies removed for clarity.

FIG. 9B is a view similar to that of FIG. 9A but depicting the track in a flexed or bent configuration.

FIG. 10 is a partial exploded/partial perspective view of a power feed assembly according to another embodiment and coupled to the track of FIG. 1.

FIG. 11 is a perspective view of a power feed assembly according to another embodiment.

FIG. 12 is a sectional view of a portion of the power feed assembly of FIG. 11.

FIG. 13 is an elevational view depicting the track of FIG. 1 coupled to the power feed assembly of FIG. 11.

FIG. 14 is an elevational view depicting the track of FIG. 1 coupled to the power feed assembly of FIG. 1, the power feed assembly of FIG. 11 and a power feed assembly substantially identical to the power feed assembly of FIG. 1.

FIGS. 15A, 15B and 15C are sectional views of the track of FIG. 14 taken along lines 15A-15A, 15B-15B and 15C-15C, respectively.

FIG. 16 is a perspective view of a power feed assembly according to another embodiment.

FIG. 17 is an enlarged perspective view of the support assembly of FIG. 1.

FIG. 18 is an exploded view of a portion of the support assembly of FIGS. 1 and 17.

FIG. 19A is a partial perspective/partial exploded view of a support assembly according to another embodiment.

FIG. 19B is a sectional view of a portion of the support assembly of FIG. 19A.

FIG. 20 is an enlarged perspective view of the lamp assembly of FIG. 1.

FIGS. 21A, 21B, 21C, 21D and 21E are elevational views depicting the coupling of the lamp assembly of FIGS. 1 and 20 to the track of FIG. 1.

FIG. 22 is an elevational view of a lamp assembly according to another embodiment and coupled to the track of FIG. 1.

FIG. 23 is a perspective view of a lamp assembly according to another embodiment and coupled to the track of FIG. 1.

FIG. 24 is a diagrammatic view of a lighting system according to an embodiment and coupled to the track of FIG. 1.

FIG. 25 is a perspective view of a lighting system according to another embodiment.

FIG. 26 is a perspective view of a lighting system according to another embodiment.

FIG. 27 is a perspective view of a transformer assembly according to an embodiment and coupled to the track of FIG. 1.

FIG. 28A is an exploded view of the transformer assembly of FIG. 27.

FIG. 28B is a sectional view of a track adapter of the transformer assembly of FIGS. 27 and 28A, a perspective view of which is depicted in FIG. 28A.

FIGS. 28C and 28D are respective perspective views of covers of the transformer assembly of FIG. 27.

FIG. 28E is a perspective view of another track adapter of the transformer assembly of FIGS. 27 and 28A.

FIG. 28F is a perspective view of the transformer assembly of FIGS. 27 and 28A and depicts another operational position of the covers of FIGS. 28C and 28D.

FIGS. 28G and 28H are end views of the covers of FIGS. 28C and 28D, respectively, of the transformer assembly of FIGS. 27 and 28A.

FIG. 29 is a simplified partial sectional/partial top plan view of the transformer assembly of FIGS. 27 and 28A and depicts operational positions of the covers of FIGS. 28C and 28D.

FIG. 30A is a view similar to that of FIG. 29 but depicting other operational positions of the covers of FIGS. 28C and 28D.

FIG. 30B is a perspective view of the transformer assembly of FIGS. 27 and 28A and depicts the same operational positions of the covers of FIGS. 28C and 28D that are depicted in FIG. 30A.

FIG. 31A is a view similar to that of FIG. 29 but depicting yet other operational positions of the covers of FIGS. 28C and 28D.

FIG. 31B is a view similar to that of FIG. 30B but depicts the same operational positions of the covers of FIGS. 28C and 28D that are depicted in FIG. 31A.

FIG. 32 is an elevational view of one end of the transformer assembly and track of FIG. 27.

FIG. 33 is an elevational view of the other end of the transformer assembly and track of FIG. 27.

FIG. 34A is a simplified partial sectional/partial top plan view of the transformer assembly and track of FIG. 27.

FIG. 34B is a view similar to that of FIG. 34A but depicting the track in a flexed or bent configuration.

FIG. 35 is a partial sectional/partial diagrammatic view of the transformer assembly and track of FIG. 27.

FIG. 36 is a view similar to that of FIG. 27 but depicting the lamp assembly of FIG. 1 and the lamp assembly of FIG. 25 coupled to the track.

FIG. 37 is a view similar to that of FIG. 35 but depicting an alternative electrical coupling between the transformer assembly and track of FIG. 27.

FIG. 38 is a perspective view of a transformer assembly according to an another embodiment and coupled to the track of FIG. 1, with the transformer assembly including covers in an operational position.

FIG. 39 is an exploded view of the transformer assembly of FIG. 38.

FIG. 40A is a perspective view of the transformer assembly of FIG. 38 depicting the covers in another operational position.

FIG. 40B is an end view of a cover of the transformer assembly of FIG. 38.

FIG. 40C is an end view of the other cover of the transformer assembly of FIG. 38.

FIG. 41 is a simplified partial sectional/partial top plan view of the transformer assembly of FIG. 38, with the covers of the transformer assembly in the same operational positions as depicted in FIG. 38.

FIG. 42A is a view similar to that of FIG. 41 but depicting other operational positions of the covers of the transformer assembly of FIG. 38.

FIG. 42B is a perspective view of the transformer assembly of FIG. 38 and depicts the same operational positions of the covers that are depicted in FIG. 42A.

FIG. 43A is a view similar to that of FIG. 41 but depicting yet other operational positions of the covers of the transformer assembly of FIG. 38.

FIG. 43B is a perspective view of the transformer assembly of FIG. 38 and depicts the same operational positions of the covers that are depicted in FIG. 43A.

FIG. 44A is an elevational view of one end of the transformer assembly and track of FIG. 38.

FIG. 44B is a partial sectional/partial diagrammatic view of the transformer assembly and track of FIG. 38, and is similar to FIG. 44A.

FIG. 45 is a perspective view of a lighting system according to another embodiment.

FIG. 46 is a perspective view of a lighting system according to another embodiment.

FIG. 47 is a perspective view of a track-connection system according to an embodiment.

FIG. 48 is a partial exploded/partial perspective view of several components of the track-connection system of FIG. 47, including a cover, upper and lower housings, and side housings.

FIG. 49 is a sectional view of the cover and upper and lower housings of the track-connection system of FIG. 47.

FIG. 50 is an exploded view of one of the side housings of the track-connection system of FIG. 47.

FIG. 51 is a sectional view of the side housing depicted in FIG. 50.

FIG. 52 is another sectional view of the side housing depicted in FIG. 50.

FIG. 53 is a simplified perspective view of the track-connection system of FIG. 47 depicting a wiring configuration according to an embodiment.

FIG. 54 is a top plan view of the track-connection system of FIG. 47.

FIG. 55 is a perspective view of a track-connection system according to another embodiment.

FIG. 56 is a partial exploded/partial perspective view of several components of the track-connection system of FIG. 55.

FIG. 57 is a diagrammatic view of the track-connection system of FIG. 55 depicting a wiring configuration according to an embodiment.

FIG. 58 is a perspective view of a track-connection system according to another embodiment.

FIG. 59 is an exploded view of a portion of the track-connection system of FIG. 58.

FIG. 60 is a sectional view of the portion of the track-connection system depicted in FIG. 59 taken along line 60-60.

FIG. 61 is a sectional view of the portion of the track-connection system depicted in FIGS. 59 and 60 and taken along line 61-61.

FIG. 62 is a diagrammatic view of the track-connection system of FIG. 58 depicting a wiring configuration according to an embodiment.

FIG. 63A is a top plan view of the track-connection system of FIG. 58.

FIG. 63B is another top plan view of the track-connection system of FIG. 58 but depicting a track extending all the way through the portion of the track-connection system depicted in FIGS. 59, 60 and 61.

FIG. 64 is a perspective view of a track-connection system according to another embodiment.

FIG. 65 is a partial exploded/partial perspective view of the track-connection system of FIG. 64.

FIG. 66 is a sectional view of a portion of the track-connection system of FIG. 64.

FIG. 67 is an exploded view of a side housing of the track-connection system of FIG. 64.

FIG. 68 is a sectional view of the side housing depicted in FIG. 67.

FIG. 69 is a top plan view of the track-connection system of FIG. 64.

FIG. 70 is a perspective view of a track-connection system according to another embodiment.

FIG. 71 is an exploded view of the track-connection system of FIG. 70.

FIG. 72 is a sectional view of the track-connection system of FIG. 70.

FIG. 73 is a perspective view of an end cap coupled to the track of FIG. 1.

FIGS. 74A, 74B, 74C, 74D, 74E, 74F, 74G, 74H and 74I are top plan views of lighting systems according to various embodiments.

FIG. 75 is a perspective view of a power feed assembly according to another embodiment.

Claims

1. A method comprising: providing a lighting track;toollessly coupling an attachment to the lighting track; andcoupling an assembly to the attachment.

2. The method of claim 1 wherein the attachment comprises a housing and wherein toollessly coupling the attachment to the lighting track comprises: hingedly coupling a cover to the housing of the attachment; andplacing the cover in a closed configuration;wherein placing the cover in the closed configuration comprises: rotating the cover relative to the housing so that at least a portion of the lighting track is positioned between the cover and the housing; andlocking the cover to the housing so that the cover is generally prevented from rotating relative to the housing; andwherein the cover is locked in response to rotating the cover relative to the housing so that the at least a portion of the lighting track is positioned between the cover and the housing.

3. The method of claim 2 wherein the lighting track comprises a pair of buss bars and wherein the assembly comprises a lamp; wherein coupling the assembly to the attachment comprises: electrically coupling the lamp to the attachment; andwherein toollessly coupling the attachment to the lighting track comprises: electrically coupling the attachment to the pair of buss bars of the lighting track; andwherein the method further comprises: generating a voltage across the pair of buss bars of the lighting track; andtransferring electrical power at the voltage from the pair of buss bars to the lamp; andwherein the lamp operates at the voltage in response to transferring electrical power at the voltage from the pair of buss bars to the lamp.

4. The method of claim 2 wherein the lighting track comprises a pair of buss bars and wherein the assembly comprises a transformer; wherein coupling the assembly to the attachment comprises: electrically coupling the transformer to the attachment; andwherein toollessly coupling the attachment to the lighting track comprises: electrically coupling the attachment to the pair of buss bars of the lighting track;wherein the method further comprises: generating a first voltage across the pair of buss bars.transferring electrical power at the first voltage from the pair of buss bars to the transformer;electrically coupling a load to the transformer; andtransferring electrical power to the load at a second voltage using the transformer;wherein transferring electrical power at the first voltage from the pair of buss bars to the transformer comprises transferring AC electrical power at the first voltage from the pair of buss bars to the transformer; andwherein transferring electrical power to the load at a second voltage using the transformer comprises transferring DC electrical power to the load at a second voltage using the transformer.

5. The method of claim 2 wherein the lighting track comprises a pair of buss bars and wherein toollessly coupling the attachment to the lighting track comprises: electrically coupling the attachment to the pair of buss bars of the lighting track; andwherein the method further comprises: electrically coupling the attachment to a source of electrical power;wherein a voltage is generated across the pair of buss bars in response to electrically coupling the attachment to the source of electrical power.

6. A method comprising: providing a lighting track;toollessly coupling an attachment comprising a housing to the lighting track, comprising: hingedly coupling a cover to the housing of the attachment; andplacing the cover in a closed configuration, comprising: rotating the cover relative to the housing so that at least a portion of the lighting track is positioned between the cover and the housing; andlocking the cover to the housing so that the cover is generally prevented from rotating relative to the housing;wherein the cover is locked in response to rotating the cover relative to the housing so that the at least a portion of the lighting track is positioned between the cover and the housing; andcoupling an assembly to the attachment.

7. A method comprising: providing a lighting track comprising a pair of buss bars and a flexed configuration;coupling an attachment to the lighting track, comprising: electrically coupling the attachment to the pair of buss bars of the lighting track; andmaintaining the electrical coupling between the attachment and the pair of buss bars when the lighting track is in the flexed configuration.

8. A method comprising: providing a lighting track comprising a pair of buss bars and a flexed configuration;toollessly coupling an attachment comprising a housing to the lighting track, comprising: electrically coupling the attachment to the pair of buss bars of the lighting track;hingedly coupling a cover to the housing of the attachment;placing the cover in a closed configuration, comprising: rotating the cover relative to the housing so that at least a portion of the lighting track is positioned between the cover and the housing; andlocking the cover to the housing so that the cover is generally prevented from rotating relative to the housing;wherein the cover is locked in response to rotating the cover relative to the housing so that the at least a portion of the lighting track is positioned between the cover and the housing;maintaining the electrical coupling between the attachment and the pair of buss bars when the lighting track is in the flexed configuration, comprising accommodating a bend in the lighting track; andforming a grounding coupling between the attachment and the lighting track.

9. An apparatus adapted to be coupled to a lighting track, the apparatus comprising: a first housing;a second housing coupled to the first housing; anda cover hingedly coupled to the second housing and comprising: a first configuration in which the cover is permitted to rotate relative to the second housing; anda second configuration in which the cover is generally prevented from rotating relative to the second housing.

10. The apparatus of claim 9 wherein the lighting track comprises a first buss and wherein the apparatus further comprises: a first contact pad assembly coupled to the second housing, the first contact pad assembly comprising: a first contact pad; andat least one contact extending from the first contact pad and adapted to be electrically coupled to the first buss bar of the lighting track when the apparatus is coupled to the lighting track and the cover is in its second configuration; anda first biasing element coupled to the first contact pad;wherein the first biasing element is adapted to provide a biasing force against the first contact pad to effect sufficient electrical coupling between the at least one contact of the first contact pad assembly and the first buss bar when the apparatus is coupled to the lighting track and the cover is in its second configuration;wherein the lighting track comprises a flexed configuration; andwherein the first biasing element is adapted to maintain sufficient electrical coupling between the at least one contact of the first contact pad assembly and the first buss bar when the apparatus is coupled to the lighting track and the lighting track is in the flexed configuration.

11. The apparatus of claim 10 wherein the lighting track comprises a second buss bar and wherein the apparatus further comprises: another contact extending from the first contact pad and adapted to be electrically coupled to the second buss bar of the lighting track when the apparatus is coupled to the lighting track and the cover is in its second configuration;wherein electrical power is adapted to be transferred between the first and second buss bars and the at least one contact and the another contact, respectively.

12. The apparatus of claim 11 further comprising: a lampholder coupled to the first housing; anda lamp disposed in the lampholder and electrically coupled to the at least one contact and the another contact;wherein the electrical power is adapted to be transferred to the lamp from the first and second buss bars when the apparatus is coupled to the lighting track and the cover is in its closed configuration.

13. The apparatus of claim 10 wherein the lighting track comprises a second buss bar and wherein the apparatus further comprises: a second contact pad assembly coupled to the cover, the second contact pad assembly comprising: a second contact pad; andat least one contact extending from the second contact pad and adapted to be electrically coupled to the second buss bar of the lighting track when the apparatus is coupled to the lighting track and the cover is in its second configuration; anda second biasing element coupled to the second contact pad;wherein the second biasing element is adapted to provide a biasing force against the second contact pad to effect sufficient electrical coupling between the at least one contact of the second contact pad assembly and the second buss bar when the apparatus is coupled to the lighting track and the cover is in its second configuration; andwherein electrical power is adapted to be transferred between the first and second buss bars and the at least one contact of the first contact pad assembly and the at least one contact of the second contact pad assembly, respectively.

14. The apparatus of claim 13 further comprising: a lampholder coupled to the first housing; anda lamp disposed in the lampholder and electrically coupled to the at least one contact of the first contact pad assembly and the at least one contact of the second contact pad assembly;wherein the electrical power is adapted to be transferred to the lamp from the first and second buss bars when the apparatus is coupled to the lighting track and the cover is in its closed configuration.

15. An apparatus adapted to be coupled to a lighting track, the apparatus comprising: a first housing;a second housing coupled to the first housing; anda cover hingedly coupled to the second housing and comprising: a first configuration in which the cover is permitted to rotate relative to the second housing; anda second configuration in which the cover is generally prevented from rotating relative to the second housing;wherein at least a portion of the lighting track is adapted to be positioned between the cover and the second housing when the cover is in the second configuration;wherein the first housing comprises an external annular recess;wherein the apparatus further comprises: a sleeve within which the external annular recess at least partially extends to define an annular region therebetween; anda spring extending within the annular region and about the external annular recess;wherein the external annular recess of the first housing defines an external shoulder;wherein the sleeve defines an internal shoulder;wherein the spring engages and is at least partially compressed between the external shoulder of the first housing and the internal shoulder of the sleeve;wherein the spring applies a biasing force against the internal shoulder of the sleeve to urge the sleeve towards the second housing;wherein the spring is adapted to further compress in response to movement of the sleeve away from the second housing;wherein, when the cover is in its second configuration, the sleeve engages the cover and the second housing in response to the biasing force applied by the spring;wherein the cover comprises an external annular recess defining an external shoulder;wherein the second housing comprises an external annular recess defining an external shoulder;wherein, when the cover is in its second configuration, the sleeve engages the respective external shoulders of the cover and the second housing in response to the biasing force applied by the spring;wherein the cover is rotated to place the cover in its second configuration from its first configuration;wherein the cover comprises at least one ramp surface for engaging at least a portion of the sleeve during the rotation of the cover to place the cover in its second configuration from its first configuration; andwherein the at least a portion of the sleeve is temporarily displaced in response to the engagement between the at least one ramp surface and the at least a portion of the sleeve.

16. An apparatus adapted to be coupled to a lighting track, the apparatus comprising: a housing;a cover coupled to the housing wherein at least a portion of the lighting track is adapted to be positioned between the cover and the housing when the apparatus is coupled to the lighting track; anda floating first contact pad assembly coupled to the housing.

17. The apparatus of claim 16 wherein the lighting track comprises a first buss bar and wherein the floating contact pad assembly comprises: a first contact pad; andat least one contact extending from the first contact pad and adapted to be electrically coupled to the first buss bar of the lighting track when the apparatus is coupled to the lighting track; andwherein the apparatus further comprises: a first biasing element coupled to the first contact pad;wherein the first biasing element is adapted to provide a biasing force against the first contact pad to effect sufficient electrical coupling between the at least one contact of the first contact pad assembly and the first buss bar when the apparatus is coupled to the lighting track;wherein the lighting track comprises a flexed configuration; andwherein the first biasing element is adapted to maintain sufficient electrical coupling between the at least one contact of the first contact pad assembly and the first buss bar when the apparatus is coupled to the lighting track and the lighting track is in the flexed configuration.

18. The apparatus of claim 17 wherein the lighting track comprises a second buss bar and wherein the apparatus further comprises: another contact extending from the first contact pad and adapted to be electrically coupled to the second buss bar of the lighting track when the apparatus is coupled to the lighting track;wherein electrical power is adapted to be transferred between the first and second buss bars and the at least one contact and the another contact, respectively.

19. The apparatus of claim 17 wherein the lighting track comprises a second buss bar and the apparatus further comprises: a second contact pad assembly coupled to the cover, the second contact pad assembly comprising: a second contact pad; andat least one contact extending from the second contact pad and adapted to be electrically coupled to the second buss bar of the lighting track when the apparatus is coupled to the lighting track;wherein the apparatus further comprises: a second biasing element coupled to the second contact pad;wherein the second biasing element is adapted to provide a biasing force against the second contact pad to effect sufficient electrical coupling between the at least one contact of the second contact pad assembly and the second buss bar when the apparatus is coupled to the lighting track; andwherein electrical power is adapted to be transferred between the first and second buss bars and the at least one contact of the first contact pad assembly and the at least one contact of the second contact pad assembly, respectively.

20. The apparatus of claim 17 wherein the cover is hingedly coupled to the housing and comprises: a first configuration in which the cover is permitted to rotate relative to the second housing; anda second configuration in which the cover is generally prevented from rotating relative to the second housing;

21. An apparatus adapted to be coupled to a lighting track comprising a buss bar, the apparatus comprising: a first housing;a second housing coupled to the first housing; anda cover hingedly coupled to the second housing and comprising: a first configuration in which the cover is permitted to rotate relative to the second housing; anda second configuration in which the cover is generally prevented from rotating relative to the second housing;wherein at least a portion of the lighting track is adapted to be positioned between the cover and the second housing when the cover is in the second configuration;wherein the first housing comprises an external annular recess;wherein the apparatus further comprises: a sleeve within which the external annular recess at least partially extends to define an annular region therebetween; anda spring extending within the annular region and about the external annular recess;wherein the external annular recess of the first housing defines an external shoulder;wherein the sleeve defines an internal shoulder;wherein the spring engages and is at least partially compressed between the external shoulder of the first housing and the internal shoulder of the sleeve;wherein the spring applies a biasing force against the internal shoulder of the sleeve to urge the sleeve towards the second housing;wherein the spring is adapted to further compress in response to movement of the sleeve away from the second housing;wherein, when the cover is in its second configuration, the sleeve engages the cover and the second housing in response to the biasing force applied by the spring;wherein the cover comprises an external annular recess defining an external shoulder;wherein the second housing comprises an external annular recess defining an external shoulder;wherein, when the cover is in its second configuration, the sleeve engages the respective external shoulders of the cover and the second housing in response to the biasing force applied by the spring;wherein the cover is rotated to place the cover in its second configuration from its first configuration;wherein the cover comprises at least one ramp surface for engaging at least a portion of the sleeve during the rotation of the cover to place the cover in its second configuration from its first configuration;wherein the at least a portion of the sleeve is temporarily displaced in response to the engagement between the at least one ramp surface and the at least a portion of the sleeve;wherein the apparatus further comprises: a floating contact pad assembly coupled to the second housing, the floating contact pad assembly comprising: a contact pad; andat least one contact extending from the contact pad and adapted to be electrically coupled to the buss bar of the lighting track when the apparatus is coupled to the lighting track and the cover is in its second configuration; anda biasing element coupled to the contact pad;wherein the biasing element is adapted to provide a biasing force against the contact pad to effect sufficient electrical coupling between the at least one contact of the floating contact pad assembly and the buss bar when the apparatus is coupled to the lighting track and the cover is in its second configuration;wherein the lighting track comprises a flexed configuration; andwherein the biasing element is adapted to maintain sufficient electrical coupling between the at least one contact of the floating contact pad assembly and the buss bar when the apparatus is coupled to the lighting track and the lighting track is in the flexed configuration.

22. A system comprising: a lighting track;means for toollessly coupling an attachment to the lighting track; andmeans for coupling an assembly to the attachment.

23. The system of claim 22 wherein the attachment comprises a housing and wherein means for toollessly coupling the attachment to the lighting track comprises: means for hingedly coupling a cover to the housing of the attachment; andmeans for placing the cover in a closed configuration;wherein means for placing the cover in the closed configuration comprises: means for rotating the cover relative to the housing so that at least a portion of the lighting track is positioned between the cover and the housing; andmeans for locking the cover to the housing so that the cover is generally prevented from rotating relative to the housing; andwherein the cover is locked in response to rotating the cover relative to the housing so that the at least a portion of the lighting track is positioned between the cover and the housing.

24. The system of claim 23 wherein the lighting track comprises a pair of buss bars and wherein the assembly comprises a lamp; wherein means for coupling the assembly to the attachment comprises: means for electrically coupling the lamp to the attachment; andwherein means for toollessly coupling the attachment to the lighting track comprises: means for electrically coupling the attachment to the pair of buss bars of the lighting track;wherein the system further comprises: means for generating a voltage across the pair of buss bars of the lighting track; andmeans for transferring electrical power at the voltage from the pair of buss bars to the lamp; andwherein the lamp operates at the voltage in response to transferring electrical power at the voltage from the pair of buss bars to the lamp.

25. The system of claim 23 wherein the lighting track comprises a pair of buss bars and wherein the assembly comprises a transformer; wherein means for coupling the assembly to the attachment comprises: means for electrically coupling the transformer to the attachment; andwherein means for toollessly coupling the attachment to the lighting track comprises: means for electrically coupling the attachment to the pair of buss bars of the lighting track.wherein the system further comprises: means for generating a first voltage across the pair of buss bars;means for transferring electrical power at the first voltage from the pair of buss bars to the transformer;means for electrically coupling a load to the transformer;means for transferring electrical power to the load at a second voltage using the transformer;wherein means for transferring electrical power at the first voltage from the pair of buss bars to the transformer comprises means for transferring AC electrical power at the first voltage from the pair of buss bars to the transformer; andwherein means for transferring electrical power to the load at a second voltage using the transformer comprises means for transferring DC electrical power to the load at a second voltage using the transformer.

26. The system of claim 23 wherein the lighting track comprises a pair of buss bars and wherein means for toollessly coupling the attachment to the lighting track comprises: means for electrically coupling the attachment to the pair of buss bars of the lighting track;wherein the system further comprises: means for electrically coupling the attachment to a source of electrical power; andwherein a voltage is generated across the pair of buss bars in response to electrically coupling the attachment to the source of electrical power.

27. A system comprising: a lighting track;means for toollessly coupling an attachment comprising a housing to the lighting track, comprising: means for hingedly coupling a cover to the housing of the attachment; andmeans for placing the cover in a closed configuration, comprising: means for rotating the cover relative to the housing so that at least a portion of the lighting track is positioned between the cover and the housing; andmeans for locking the cover to the housing so that the cover is generally prevented from rotating relative to the housing;wherein the cover is locked in response to rotating the cover relative to the housing so that the at least a portion of the lighting track is positioned between the cover and the housing; andmeans for coupling an assembly to the attachment.

28. A system comprising: a lighting track comprising a pair of buss bars and a flexed configuration;means for coupling an attachment to the lighting track, comprising: means for electrically coupling the attachment to the pair of buss bars of the lighting track; andmeans for maintaining the electrical coupling between the attachment and the pair of buss bars when the lighting track is in the flexed configuration.

29. A system comprising: a lighting track comprising a pair of buss bars and a flexed configuration;means for toollessly coupling an attachment comprising a housing to the lighting track, comprising: means for electrically coupling the attachment to the pair of buss bars of the lighting track;means for hingedly coupling a cover to the housing of the attachment;means for placing the cover in a closed configuration, comprising: means for rotating the cover relative to the housing so that at least a portion of the lighting track is positioned between the cover and the housing; andmeans for locking the cover to the housing so that the cover is generally prevented from rotating relative to the housing;wherein the cover is locked in response to rotating the cover relative to the housing so that the at least a portion of the lighting track is positioned between the cover and the housing;means for maintaining the electrical coupling between the attachment and the pair of buss bars when the lighting track is in the flexed configuration, comprising means for accommodating a bend in the lighting track; andmeans for forming a grounding coupling between the attachment and the lighting track.